Abstract

The rise of graphene and its success as an electronic material is driving an increasing interest in the electronic properties of two dimensional materials. Materials of this class manifest some exotic properties that are fundamentally interesting and are considered as a promising platform for advanced technology.

The talk will include experimental and theoretical data, collected from fabricated devices and from first principles calculations and will cover fundamental studies as well as device applications based on graphene and MoS2.

Graphene is an attractive material for applications in photodetection due to its flat absorption spectrum, high electron mobility and relatively energetic optical phonons. Doping schemes that lead to formation of permanent P-N junctions and facilitate the collection of photocurrent in graphene-based detectors will be presented. Following the experimental studies, a discussion on the potential of harvesting solar energy from graphene will be carried based on theoretical investigations.

Additional to graphene, some unique properties of few-layers MoS2 will be presented. Among such properties are substrate induced doping and characterization with scanning probe techniques, theoretical prediction on band-gap tuning and adjustable sub-band splitting. These properties make MoS2 a promising material for future applications in digital electronics and for applications in hyperspectral sensing and imaging systems.